RADEON X800 PRO
The RADEON X800 Pro’s distinguishing features, compared to the RADEON X800 XT Platinum Edition, are reduced clock rates and availability of only 12 pipelines in the core. The total amount of transistors is the same in both cards, but some of them do not work in the X800 Pro – 4 pixel pipelines are disabled. I took a RADEON X800 Pro card from PowerColor for my tests:
This card doesn’t differ from the reference cards from ATI in anything except the sticker on the casing of the cooling system. Its standard frequencies are 475/900MHz. Overclocking was normal: without any modification of the cooling system or volt-modding, the card was stable at 530/1180MHz at best.
It’s clear from the diagram that the RADEON X800 Pro has just a little lower values of power consumption and heat dissipation than the top-end model in the Idle mode, but the gap widens in the Burn mode. Without overclocking, the RADEON X800 Pro consumes about 25% less than the X800 XT Platinum Edition (and 15% less at overclocking). This difference – 15% and 25% - is explained by the fact that the clock rates of the RADEON X800 Pro grew up more than those of the X800 XT Platinum Edition.
The RADEON X800 Pro and the RADEON X800 XT Platinum Edition have a similar design, so they consume power in a similar way: the RADEON X800 Pro also feeds mostly out of the additional power connector.
The overclocked RADEON X800 Pro experienced a bigger consumption growth than the X800 XT Platinum Edition: 13.4% in the Idle mode and 15.1% in the Burn mode (its core frequency grew by 11.6%, and the memory frequency grew by 31%).